Pavement



W. T. IVIAIRGETTS.

PAVEMENT.

APPLICATION FILED MAR. 7. I9I7. 1,402,942. Patented Jan. 10, 1922.

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Application led March 7, 1917. Serial No. 152,984.`

To all wlw/m, it 'may concern.'

Be it known that l, 1W AL'rnn T. Mansnrrs, a citizen of the UnitedStates" ofv America, residing at New York, New York County, New York.,have invented new and useful pavements, of which the following is a.speciication.

This invention relates to paving.

rifhis invention has utility in the produc'- tion of pavement involvingdissimilar materials as wood and stone or brick.

Referring to the drawings:

Fig. l is a perspective view showing the features' of pavementproduction as to mode of laying;

Fig. 2 is a fragmentary perspective view of the pavement completed byuse7 the pavement of Figs. 1 and 2 being especially adapted for theutilization of old paving blocks as of granite or other stone;

Fig. 3 is a view similar to Fig. l with bricks as the inorganic orrelatively frangible material to be alternated with the wood; and

Fig. fl is a fragmentary perspective View of the pavement of Fig. 3 whenworn to completed condition.

In the production of pavements as herein disclosed, it is desirable toprovide a substantial foundation l, say of concrete, adequate to carrythe loads and having` its surface determined as to the grade of thefinished pavement. In the building on this base of a pavement embodying4say old granite paving blocks, it is desirable to spread over theconcrete base, a moist mortar bed 2 of sand and cement, and dispose inparallel rows on this moist bed, the granite blocks 3 with the space 4lbetween each row.

The setting of these blocks may be followed up by filling into thespaces 4 moist mortar 5 up to a grade say 3% below the top of thegranite block if all deep wood block 6 is to be used. This filling ofmoist mortar bed 5 of sand and cement is tamped well into the spaces 4to determine the proper level.

The wood blocks 6 are set to break joints with the granite blocks 3 andare setto have their grain up and further are provided with theexpansible end take up or ribs 7, and placed into position in thenspaces 4 above the moist mortar bed 5. The blocks may be pushed down?say at the iniJ Specification of Letters Patent.

working to a straightsurface with the wood ratentea aan. io?, asas.

tial setting to about iff exposed, then with a broad rammer be broughtdownv to have their top level about el above the granite blocks.` Theincomplete paving surfaceprovided by the granite blocks 3 completed bythese alternating rows of wood paving blocks f5, say impregnated withcr'eosote` or nient to a level wear-olf surface for the trailic whichforces this iiller to occupy all .interstices and gra dually wear downto work a uniform level 'of pavement through the topping. y

The interaction between the relatively frangible inorganic blocks 3 andthe relatively tough vorganic impregnated wood blocks 6 results in theinorganic blocks 3, say if from loldroad work and rounded, in

blocks which wood blocks swell up or conform to the edges of the graniteblocks in such a way as to protect such edges from fracture.

There is further utility in that these wood blocks with grain up havetheir maximum expansion regions in the plane of the pave nient thusassisting in gripping laterally7 to save the granite block edges, butfurther 3o-operating longitudinally to a greater eX- tent. The expansionof the wood blocks in the longer dimension direction is partially takenup by the crus'hable lugs 7. However, in the squeezing of the woodblocks by the more rigid earthen blocks, there results a -mutualinteraction for distributing the load throughout the pavement.

This is a feature of utility in pavement life maintenance and is furtherevidenced as of great utility in its cooperation with track work in thestreet. The rails are so squeezed as to be held against vibration. Thereis enoughwood in the pavement as directly coacting with the base foreffectively deadening sound transmission. This v gripping `effect with adesirable anti-skid pavement has even greater utility in the specialwork along the street railway lines holding the rails and switches atturns and cross-overs against the working loose due to the severetraffic to which they are subjected thereby materially lengthening thelife of such installations.

There may be in this gripping action for distributing the load on thegranite blocks and the wood blocks, a kind of arched action in the binddue to the snug expansion fitting say between the rails 9, 10.

The granite blocks, initially rounded if secondhand as shown in Fig. l,in the automatic finishing of the pavement appear as the truly.vsurfaced blocks 1l7 Fig. 2, brought to the surface of the wood pavingblocks 6 which have their terminal lugs 7 more or less compactedaccording to the crushing strain.

This great utility in the utilization of old paving stones as well asnew is also present in the vitrified or clay product paving blocks 12incorporated with the wood blocks 6 as shown in Fig. 8,the laying ofwhich may occur in a similar manner as of the granite blocks 3 exceptthat the paving base `may not need any supplemental filling in thespaces 4 or the pavement may be laid direct upon a uniform pavementbase.

The Wood strengthens and gives life toK the brick, for the weakness 0fthe brick is not present. The wood `of the block precludes any beatingor breaking off of the brick block edges. The slippery features oftheimpregnated wood lblocks do not develop as objectionable skiddingqualities in the combined pavement because the stone or brick anti-skidfeature provides a surface for ready adherence of heavy vehicle trafficaswell as rapidly moving cars.

This pavement of dissimilar blocks, accordingly, is one of great loadcarrying strength, of practically permanent life in it-V self las itseals the base from moisture attacks, is sanitary in that it is readilyand thoroughly cleaned even by flushing,v and amalgamates as a unit forcarrying the load and stiffening railway tracks:

What is claimed and it is desired to secure by Letters Patent is:

1. A pavement embodying a foundation, spaced rows of earthen blocks onsaid foundation, grain-up wood blocks disposed in said spaces tocomplete the pavement as to pavement extent, said wood blocks protrudingabove the earthen blocks, and a surfacing material over the earthenblocks adapted to be worn down by trafiic as the protruding portions ofthe wood blocks are worked into protecting position for the edges of theearthen blocks.

2. The method of completing a pavement embodying installing an unevensurface grain up wood block and earthen block pavement, with the woodblocks protruding above the earthen blocks, and coating the unevensurface, whereby wearing down said coating and the protruding wood blockupper ends protect the edges of the earthen blocks. A

In witness whereof I affix my signature.

WALTER T. MARGETTS.

